List of insiders holdings for Alector Inc.:
- Shares directly owned by the insider.
- Shares indirectly owned by the insider.
- Total shares owned by the insider (sum of shares directly and indirectly owned).
- Total market value if available.
- Shares are not adjusted for stock split.
"Insiders might sell their shares for any number of reasons, but they buy them for only one: they think the price will rise"
- Peter Lynch
What is insider trading>>
- Peter Lynch
What is insider trading>>
| # | Insider Holder Name | Report Date Time | Shares Owned Directly Indirectly | Total Shares Owned | Filing |
| 1 | MCGUIRE TERRANCE Director 10% Owner | 2023-09-13 16:29:03 | 54,996 10,893,216 | 10,948,212 | Form 4 |
| 2 | Polaris Venture Management Co. VI L.L.C. Polaris Venture Partners VI (AIV) L.P. Polaris Venture Partners Founders' Fund VI L.P. Polaris Venture Partners VI L.P. Polaris Venture Partners VI (AIV-B) L.P. 10% Owner | 2024-11-12 19:21:57 | 9,977,877 0 | 9,977,877 | Form 13G |
| 3 | Rosenthal Arnon Chief Executive Officer | 2025-07-01 17:00:10 | 2,597,482 3,930,375 | 6,527,857 | Form 4 |
| 4 | ORBIMED ADVISORS LLC OrbiMed Capital GP IV LLC ORBIMED CAPITAL LLC 10% Owner | 2020-07-16 17:12:51 | 2,725,313 0 | 2,725,313 | Form 13D |
| 5 | ORBIMED ADVISORS LLC OrbiMed Capital GP IV LLC 10% Owner | 2020-07-16 17:12:51 | 2,725,313 0 | 2,725,313 | Form 13D |
| 6 | Gerngross Tillman U. Director | 2023-06-15 16:04:03 | 2,656,679 0 | 2,656,679 | Form 4 |
| 7 | SULIMAN SHEHNAAZ President and COO | 2021-12-14 20:23:09 | 787,972 0 | 787,972 | Form 4 |
| 8 | Kenkare-Mitra Sara President and Head of R&D | 2025-07-01 17:00:12 | 585,227 0 | 585,227 | Form 4 |
| 9 | King Robert Chief Development Officer | 2022-10-04 20:05:59 | 565,255 0 | 565,255 | Form 4 |
| 10 | Paul Robert Chief Medical Officer | 2021-08-11 18:23:30 | 431,019 0 | 431,019 | Form 4 |
| 11 | Romano Gary Chief Medical Officer | 2025-03-05 16:05:05 | 332,977 0 | 332,977 | Form 4 |
| 12 | GRASSO MARC Chief Financial Officer | 2025-06-04 16:21:21 | 296,072 0 | 296,072 | Form 4 |
| 13 | Yu Calvin Vice President, Finance | 2021-07-07 19:38:23 | 220,498 0 | 220,498 | Form 4 |
| 14 | Wong-Sarad Grace Principal Accounting Officer | 2025-06-30 16:45:04 | 199,588 0 | 199,588 | Form 3 |
| 15 | LAVIGNE LOUIS J JR Director | 2025-06-12 18:05:06 | 108,859 10,552 | 119,411 | Form 4 |
| 16 | Wehner David M. Director | 2024-06-12 16:46:05 | 115,330 0 | 115,330 | Form 4 |
| 17 | Oney Sabah Chief Business Officer | 2020-10-05 16:31:00 | 109,689 0 | 109,689 | Form 4 |
| 18 | SCHELLER RICHARD H Director | 2025-06-12 18:05:07 | 104,816 0 | 104,816 | Form 4 |
| 19 | GAROFALO ELIZABETH A. Director | 2025-06-12 18:05:09 | 99,400 0 | 99,400 | Form 4 |
| 20 | Hammond Paula Director | 2025-06-12 18:05:20 | 98,359 0 | 98,359 | Form 4 |
| 21 | Yaffe Kristine Director | 2025-06-23 16:05:04 | 95,409 0 | 95,409 | Form 4 |
| 22 | Altmeyer Mark Director | 2025-06-12 18:05:03 | 79,400 0 | 79,400 | Form 4 |
| 23 | DESOUZA ERROL B Director | 2025-06-12 18:05:05 | 79,400 0 | 79,400 | Form 4 |
| 24 | GORDON CARL L Director 10% Owner | 2019-05-14 17:45:25 | 20,000 0 | 20,000 | Form 4 |
| 25 | Berkley Neil Lindsay Principal Financial Officer | 2025-07-01 17:00:14 | 18,000 0 | 18,000 | Form 4 |
| 26 | Rubinstein Linda M Interim Chief Financial Ofcr | 2021-09-09 16:31:18 | 0 0 | 0 | Form 3 |